Cobalt(2) chloride is commonly obtained from chemical supply houses as a hydrate with the formula COCL2*6H2O an analysis showed that 25.0 g of this hydrate contains 11.3 g of water what is the percent water by weight in this hydrate?'

%H2O = (mass H2O/mass sample)*100 = ?

45.2

To find the percent water by weight in the hydrate, you can use the following formula:

Percent water by weight = (mass of water / total mass of hydrate) * 100

Given that 25.0 g of the hydrate contains 11.3 g of water, we can calculate:

Mass of water = 11.3 g
Total mass of hydrate = 25.0 g

Now, substitute these values into the formula to calculate the percent water by weight:

Percent water by weight = (11.3 g / 25.0 g) * 100

Simplifying:

Percent water by weight = 0.452 * 100

Therefore, the percent water by weight in this hydrate is approximately 45.2%.

To find the percent water by weight in the hydrate, we need to calculate the mass of water and then divide it by the mass of the entire hydrate.

Given:
Mass of the hydrate (COCl2 * 6H2O) = 25.0 g
Mass of water (H2O) = 11.3 g

Step 1: Calculate the mass of the anhydrous salt (COCl2)
To do this, subtract the mass of water from the mass of the hydrate.
Mass of COCl2 = Mass of hydrate - Mass of water
Mass of COCl2 = 25.0 g - 11.3 g = 13.7 g

Step 2: Calculate the percent water by weight
Percent water by weight = (Mass of water / Mass of hydrate) * 100
Percent water by weight = (11.3 g / 25.0 g) * 100
Percent water by weight = 45.2%

Therefore, the percent water by weight in this hydrate is 45.2%.